gisborne



(No Model.) 3 Sheets-Sheet 1.

J. S. GISBORNE.

SHIP TELEGRAPH.

No. 266,987. Patented Nov. 7, 1882.

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(No Model.) vSheets-Sheet 2;

J. S. GISBORNE. SHIP TBLEGRAPH.

180.288,98?. Patent-ed Nov. 7, 1882.

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(No Model.) 3 Sheets-Sheet 3.

J. S. GISBORNE.

lSHIP TELEGMPH.v

N0. 266,987. Patented NOV. 7, 1882.

'(1/1/11lllllllllllllllz/ y UNITED STATES PATENT OEEICE.

JOHN S. GISBORNE, OF OHARING CROSS, COUNTY OF MIDDLESEX, ENGLAND.

SHlPTELEGFiAPH.

SPECIFICATION forming part of Letters Patent No. 266,987, dated November'7, 1882.

Application filed August 31, 1880.

To all 'whom it may concern Be it known that I, JOHN SACEEVERELLGISBORNE, of Charing Gross, in the county ot' Middlesex, England, haveinvented acertain new and useful Improvement in Ship-Telegraphs, ofwhich the following is a specitication.

My invention relates to telegraphs to be used on shipboard for thepurpose of conveying or- '1o ders from officers to engineers, steersmen,gunners, or other attendants, and ot' repeating back such orders to showthat they have been received, similar apparatus being applicable for thepurpose ot' communicating the direction and rate of the engines and theangle of the rudder. For this purpose I provide in a convenient part ot'the vessel a transmittinginstrument or transmitter having a dial withdivisions marked with the orders which are to 2o be transmitted and anindex movable by hand over said dial, and in some other part of theyessel I provide a receiving-instruinent or receiver which has a dialupon which are indicated the ordei's transmitted.

My invention relates'only to the receivinginstrument; and it consists inthe combination, in such an instrument, ot a dial having in ita circularseries of openings, a series of screens arranged below or behind saiddial, pivoted arms to which saidl screens are fixed, electromagnetswhereby any one of said screens may be moved to cause it to appearopposite an opening in the dial, a ring comprising notches which receivesaid pivoted arms to lock said screens, and au electro-magnet for movingsaid ring to release said screens and arms, as hereinafter more fullydescribed.

In the accompanying drawings, Figure l represents a vertical section ot'the transmittinginstrument, which may be advantageously mounted on apedestal or column with its face in a horizontal position. Fig. 2represents a plan or face view of said instrument. Fig. 3

represents a horizontalsection thereof below the dial. Fig. 4 representsa face view ofthe receiving-instrument. Figs. 5 and 6 representrespectively horizontal sections of the transmitting and receivinginstruments with their line-connections. Fig. 7 represents a central 5overtical section of the receiving-instrument.

Fig. 8 represents a horizontal section of the (No model.) Patented inEngland August 30, 1878, No. 3,428.

receiving-instrument on a larger scale, and Fig. 9 represents a centralvertical section ot' the receiving-instrument ou the same scale as Fig.8.

Similar letters ot' reference designate corresponding parts in all theligures.

A designates the index hand or finger, which is turned by the handle a,to any one of the divisions ot' the dial, as shown in Fig. 2.

On the axis of the index A, Linder the dial, is fixed an arm, B,carrying a roller, b, which is pressed by springs against the interiorsurface of an insulated ring, C. This ring has notches iitted or filledwith non-conducting material-suoli as ebonite-as indicated in black inFigs. 3 and 5. When, on turning the index, the roller b is made to passover a con ducting portion, c, of the ling C, an electrical circuit iscompleted through line-wires, one of 7o which is connected to the dialand handle and the other with the ring C, and in which is a battery anda receiving-instrument; butas the roller b passes over thenon-conducting portions ofthe ring O the circuit is interrupted.

A transmitting and my improved receiving instrument are shown in Figs.4, 5, 6, and 7. The transmitter has a dial similar to that shown in Fig.2; but'the receiver has a dial, as shown in Fig. 4, in which is acircular series 8o of openings, each coriesponding with one of theorders to be signaled. Behind each ot' these openings is mounted a lightscreen, K, as seen in Fig. 6, which is a section taken behind tliereceiver-dial, and in Fig. 7, which is a vertical section ot thereceiver, and as seen more clearly in Figs. 8 and 9. Each of the screensK is colored one half, say, white and the other halt', say, red, and ismounted on a radial arm, s, which is made to oscillate from 9o one sideto the other b v means of electromagnets b, of which there isa set forcach screen, acting on them in the manner well known intelegraph-instruments employed t'or block signaling on railways. Inorder to maintain a signal securely until it is observed andacknowledged by the attendant, the screens K may be locked in tbefollowing manner: The arm s', on which said screen is fixed, has aspring-tail projecting beyond its pivot and roo resting lightly on theedge of a ring, M, which has cut in it a number of notches-one for cach-2 acces? arm s. This ring is fixed on orcarried by the armature of anelectro-magnet, N, and kept up by a spring or springs. In the samecircuit in which is the magnetN may be another magnet for working a bellor gong, and both the transmitting and receiving instruments may havesecondary dials for indicating that the orders have been received andattended to.

The transmitting-instrument shown in Fig. 5 is similar in verticalsection to that shown in Fig. 1, and is in electrical communication witha battery or batteries by means ot' the telegraph-cable -l-l, containingthe requisite number ot'insulated copper wires. These wires, on arrivingat the transmitti11g-instrument, are all except one soldered or attachedto the several con tact-pieces o, while that one is soldered or attachedto the ring C.

The. said transmitti11g-instrument is in electrical communication withthe receiving-instrument, Fig. 6, which, receives the outgoing ornegative current conveyed from the transmitter by a telegraph-cable,-Z,through an insulated copper wire soldered to the metal. case vot' thetransmitter, which is in const-ant contact with and receives the currentfrom the indexhandle a, (see Fig. 1,) forming a part of the arm B androller b. The other end of said cable consists ot' a number of insulatedwires, which, upon reaching the receiver, diverge, and are all except.one connected with the positive poles of the several electro-magnets L,vwhile that one is connected to the positive pole ot' theelectro-magnetN. (See Fig. 7.) Thenumber ofthe electro-magnets Lcorresponds with the number of screens K, and also with the number oforders on the dial ot the transmitting-instrument. From the negativepoles of all the magnets L and the magnet N the several wires convergeand are collected in a cable, Z, (see Fig. 6,) and, thence proceeding tothe above-mentioned battery or batteries, are severally connected withthe negative plates thereof. These wires are not shown on the drawings,as they would be likely to lead to confusion.

The ring M has c ut in it anumber of oblique notches-one for eachscreen-and into one of which the tail ot' the arm s of a screen willfall when the screen is moved over by its electro-magnet L. Itis,however, released at once when the roller b travels over the space orcontact-piece c of the. ring C and puts in action the magnet N, therebyreleasing the ring M.

From the foregoing it will be seen that the roller b, when in operationand during its course round the interior of thetransmittinginstrument,passes necessarily over the parts o--c-o-c, (therepresenting thenon-conducting portion ofthe ring 0,) alternately making the electriccircuits between the dial ot' the transmit-ter and the electro-magnets LL L, which work the screens K K K, and between the ring C and the magnetN, which latter, when attracting its armature, draws down ring M andreleases at each operation a screen from the position in which it waspreviously secured.

In Figs. 5 and 6 the electric circuit is shown to be completed betweenthe two iustrumen'ts. In this instance it is eii'ected by the contact ofthe roller b with the contact-piece 0*, correspending to the order halfahead77 on the dial of the transmitting-instrument, Fig. 2. This circuitsets in action the electro-magnet L* and detlects the screen Kit, whichnow presents its red half through the opening in the dial ot' thereceiving-instrument, Fig. 4, corresponding to the signal" halt'ahead,77 while all the other screens, having been successively released,present their white portions opposite the openings. i

In order to prevent the roller b from ever being left at rest against aconducting part of the ring C in such position asis shown in FiO. 5,which would involve a continued and unnecessary expenditure ot'electrical force, the index-spindle has fixed on it a wheel, P, (shownin Fig. 1,) havingiuclined teeth, with which a spring-pawl, p, engages.This pawl,by its eftort to enter the space between two inclined teeth,causes the index-spindle to turn far enough oneway or the other to bringthe roller b off from a conducting portion of the ring G-such as coro-and on a non-conducting portion, breaking the circuit and leaving thebattery quiescent. l

l am aware that dial telegraph instruments have been made in which areembodied the combination ofa dial upon which are delineated the ordersto be transmitted, a finger or index movable over said dial, and an armfixed upon the spindle of said index and carrying da roller, which bearsupon aring comprising contact-points and non-conducting portions, and asthe index and arm are turned makes and breaks contact with said pointsand transmits a succession of electric currents through wires extendingfrom said contact-points. I there fore do not claim thetransmitting-instrument herein illustrated as of my invention.

NVhat l claim as my invention, and desire to secure by Letters Patent,is-

The combinatiomin the receiviiig-instrument cfa dial-telegraph, of adial having in it a number of openings, a Series of screens arrangedbelow or behind said dial, pivoted arms to which said screens are fixed,electro-magnets whereby any one of said screens may be moved to cause itto appear opposite an open.

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